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Genomic Analysis of the Sea Urchin Led to the Discovery

Question 28

Multiple Choice

Genomic analysis of the sea urchin led to the discovery that there are no genes coding for gap-junction proteins or for adrenaline. Functionally, this suggests that


A) there are no gap junctions in sea urchins.
B) there is no cellular communication system in sea urchins.
C) sea urchins are not related to vertebrates.
D) the cellular communication system of sea urchins is unusual.

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